Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1be7dd8ccd0c6c9…

MALICIOUS

PDF

85.9 KB Created: 2021-03-13 18:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e1170d4152568a614d75f1ba6a8afd SHA-1: 73b2c0ba473cfc881054086518ba496a93649a56 SHA-256: d1be7dd8ccd0c6c9bfc8a50e5e194cb70a22d6a4728a8eae143bbbacecf344f0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure for downloading a PDF. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/award?keyword=april+2020+current+affairs+pdf+free+download
    • http://rulajamizap.getenjoyment.net/soneweregurodi.pdf
    • https://static.s123-cdn-static.com/uploads/4415530/normal_5fedd481e5f0b.pdf
    • http://tujijamutibe.sportsontheweb.net/76022055678.pdf
    • http://binadof.iblogger.org/bomag_compaction_guide.pdf
    • http://pelabinowoguk.getenjoyment.net/95363083821.pdf
    • https://cdn-cms.f-static.net/uploads/4497110/normal_60473adf4e881.pdf
    • http://sowivonowiso.iblogger.org/kmspico_windows_10_pro_64_bit.pdf
    • https://static.s123-cdn-static.com/uploads/4403271/normal_5ff4f8e0abdd1.pdf
    • http://tinubovibiwiwi.iblogger.org/reduced_university_fees_coronavirus.pdf
    • http://gaxesujite.medianewsonline.com/fomivubekawivedenapesetev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zusobowes.rf.gd/78763231426.pdf
    • http://werewipabelud.rf.gd/32018986886.pdf
    • http://nebojemesiwi.atwebpages.com/bali_itinerary_4_days.pdf
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_721cdc5af746483b9e9bd9bfbab0176a.pdf?index=true
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_ef83c41c825e41199d58a671fe1c9659.pdf?index=true
    • http://ruxuwidoke.epizy.com/worksheet_food_english.pdf
    • http://susabumo.atwebpages.com/vezetojamufisepum.pdf
    • http://juvusowupu.onlinewebshop.net/75466042682.pdf
    • http://mevomum.epizy.com/how_to_use_black_and_decker_microwave.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe7.bin
3ba64263bc16d05cd5b06daee93131537c0458d89bca3d436e32ff61e59c2694
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 5504 bytes
font_01_sfnt_off000122c2.bin
be56be2d25ce2259b65c4e74877287b60dca883cbfb624ae8102aeb6830fec87
pdf-font-stream PDF embedded font (sfnt) at offset 0x122C2 11476 bytes